Valve-dresser.



PATENTED NOV. 20, 1906.

F. G. CRQNE.

VALVE DRESSER.

APYLICATION FILED JAN. 29, 190e.

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l The dresser lproper is shown at 1.

UNITED A sTATns PATENT cierran VALVE-DRESSER.

No. ssefisv.

ISpecification of Letters Patent.

Patented Nov. 20, 1906,v

T aZZ ugh/0m it may concern.'

Be it known that I, FRANCIS G. CRoNE, a citizen of the United States, residing at Buffalo, i-n the county of Erie and State of New York, have invented a new and useful Improvement in Valve-Dressers, oi" which the -following is av specification.

My invention rel at'es to 'valve-dressers, and moi/e particularly to universal dressers which will dress valves of different sizes andwhich are seated ondiiierentangles, and I have so arranged my device thati'it is portable in form..l i,

. In Athe present large use of explosive-engines', especially in` automobiles, there is special demand for av portable g dresser suliciently universal to meet the conditions of standard constructions. M

though it haswother large uses for valvedressing.

I carry out my invention by the apparatus shown in the annexed drawings, in which- Figure 1 is--a longitudinal sectio'n of my valve-dresser with a valve in place 'for dressing, the inner position of the screwstem being shown in'dotted lines. i Fig. 2 is a crosssection on the line fr of Fig. 1 looking to the right. Fig.. -3 is a longitudinal detail showing a modifiedconstruction. Fig. 4 is a 'section on the line {L/ y of Fig. 3. i

Iwill rst describe my valvedresser."'.

consists of a piece of hardened steel having fiuted 'dressing-ribs 2 of the proper angle or degree for' the seating-face of 'the valve.

This steel piece is concentrically screwthreaded at. 3 to receive -the tube 4 and is bored and threaded on opposite sides to re- -ceive ythe lugs 5 and of' aclamp 7.. By

means of this clamp 7 the dresser ma be attached to a iixed object to facilitate't e operation of dressing. A valve and valve-stern areshoyvn in place at 8 and 9, respectively. Inl cylindrical openings in the tube 4 are ins erted steel balls10 and 11 of equal diam'ef ter andA symmetrically arranged radially.'

Taking'over the tube 4 is a sleeve composed .of the two members 12 and 13 anda set-nut" 14. The sleeve 12 has a male thread and the bored cone-'shaped totake over and pressin-y wardly the bal s 10 and 11. Threaded into the tube 4is a tube..15, is held by a invention is especially designed to meet tv 's demand, al

ThisA Applicationileddanuary 29, 1906. Serial No. 298,4Q2.

lock-nut 15". Secured to this tube 15 is a nut 1 6, into which takes a long threaded screw-stem 17, having a curved head 1S and which may be locked by a lock-nut 19. The inner end of this screw 17 engages against a cylindrical plug 20 and is capable of traveling back and forth in the tubes 4 and 15, which have an equal internal diameter. Threaded externally to the tube 4 is a nut 21 and a checkjnut 22. The nut 21 is capable of' bearing against the end of the sleeve i3; H'avingnow indicated the several parts of this part ol' my invention, I will describe its operation. j

Assume it is desired to .dress the valve 8. The valve-stem 9 is inserted in the tube 4 and the seating-face brought into contact with the dressers 2l. The vsleeve 13 is vthen rotated lon the sleeve 12 the direction to extend This brings the inner cone-shaped faces of the sleeves 12 and 13 against the balls 10 and 11 and forces these sleeves lengthwise.

them concentrically inwardly against 'the .stem 9. This centers the stein 9eoncentric with the sleeve 4, and sleeve 4 and dresser 1 being concentric the valve 8- is held concenvset-nut 19, and `the clamp; having been attached lto a fixed object the adjustmentfor dressing is complete. A screwedriver is inserted in the slot in the stem 9, andthe stem 9 and the valve 8 are rotated against the dressers 2 until the valve is dressed. The stem 17 and the plug 20 prevent the dresser from hogging, and if-the adjustment of the stem 17 is too close to permit oi' full dressing of the valve it may be slacked slightly and the dressing continued.

I will now explain the use ci' the nuts 21 and 22. Suppose a valve has a veryshort stern-so short that when the valve is in place the stem will not extend intoengagement with the balls 1 1. In that case I insert the valve, as before, and screw the nut 4against the end ol the Asleeve 13 and force -sleeves 13 and 12 forward until the hollow cone of sleeve 12 engages vthe .balls 10 and forces them inwardly against the valve-stem. I then screw down the stem 17 and plug 2t), as beiore, and thus hold the valve and stem IJO with only one set of balls. I may thus use the device with a valve of any length of stem.

In Figs. 3 and 4 I have shown a modified form `of construction, wherein I substitute for the balls and l1 lugs 23. These lugs are much like the jaws of a chuck and fit into slots in the tube 4in place of the balls.

have inclined outer surfaces to engage with countered I prefer i faced sleeves 12 and 13.

the internal cones of the sleeves 12 and `1 3. While for general uses the balls are preferable, whenshort valvetems are frequently en- Ihre lugs 23 in place of the balls 10, at least since they afl'ord a linebearing on the valve-stem instead of a pointbearing in the case of the ball and hold the stem more rigidly. n

It will now be seen thatv by havinga' set of valve-dressers of the various standard pitches this tool becomes practically universal, since the different valve-dressers threaded to receive the tube 4 and the lugs 5 and 6 may be interchanged, and the dressers threaded to receive the sleeve 27 may be also interchanged, and thus almost all standard valves may be ground. l

Manifestly in case a number of valves of standard size are to be dressed the tube 4 may be constructed with fixed pilots for concentrically centering the valve-stem 9 within the tube, and in such case the fixed pilots would take the place of the balls 10 and 11 and the overlapping screw-threaded cone- In' such event it is obvious that the same functions would be performed in the sarne way by such substitution of fixed parts as are performed by the movable parts shown in the drawings and heretofbre described; but insuch case if fixed parts are used they can beonly used with valves having stems of one standard size.

Havingthus described my invention, what I claim is- 1. A mechanism for dressing valves comprisinga valve-dresser, a' tube concentric therewith, balls symmetricallyy arranged in openings in said tube located at different points 1n its axis and sleeves screw-threaded to each other, taking over said tube and having internal cone-shaped faces capable of engagin said balls.`

2. mechanism for dressin valves comprising a valve-dresser, a tu e concentric therewith, jaws symmetrically arranged in openings in said tube located at different points in its axis and sleeves screw-threaded Theyto each other, taking over said tulle and hav- E ing internal cone-shapedfaces capable of engaging said ]aws.

3. A mechanism for dressing valves comprising a valve-dresser, a tube concentric 6o therewith, ballasymmetrically arranged in openings in said tube located at different points in its axis, sleeves taking over said tube screw-threaded to each other and having internal cone-shaped faces capable of enfgaging said balls and a screw-threaded stern and nut mediately secured to saidtubeand concentric therewith.

4. A mechanism forV dressing valves comprising a valve-dresser, a tube concentric 7o therewith, balls symmetrically arranged lnx openings in said tube, .located at differentV ,points in its axis, sleeves taking over said A )tube screw-threaded to each other andfhavgaging said balls and a clamp detachably secured to said dresser for securing said dresser to a fixed object.

5. A mechanism for dressin valves coming internal cone-shaped faces capable of en- 75 prising a valve-dresser, a tu e concentricA 8o therewith, balls symmetrically arran e'd in openings in said tube located at di erent points in its axis, sleeves taking over said tube screw-threaded to each other and having internal cone-shaped faces capable of engaging said balls and a nut and a check-nut externally threaded to said tube and capable of engaging the end of said sleeves to ermit the same tobring one set of said ba s into action when the valve-stem is too short to be 9ol engaged by both sets of said balls.

6. A mechanism for dressin valves comprising a valve-dresser, a tu )e concentric therewith, balls symmetrically arran ed in openings in said tube located at di erent IOO inv said dresser to a fixed object and detach- `ab ly secured to said dresser.

' 7. Amechanism for dressing valves coinprising a valve-dressing tool having a central perforation, a tube secured-thereto concentric therewith which is adapted to rv ceive the valve-stem and means vconnected th-said tube for seating said valve-stem concentrically within said tube.

In testimony whereof I have hereuntoset my hand in the presence of two witnesses.

. FRANCIS G. CRONE. Witnesses E. A. KELLY, W. E. BABBITT.

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